Improvement in blowers



UNITED STATES PATENT OFFICE.

HENRY TlIIRION, OF MIRECOURT, FRANCE.

'lMPROVEMENT IN BLOW'ERS.

Specification forming part of Letters Patent No. 33,613, dated October 29, 1861.

To all whom it may concern.-

Be it known that I, HENRY THIRION, of Mirecourt, (Vosges,) France, have inventeda certain new and useful Improved Blast-Machine, which is set forth and ascertained in the following description and drawings.

Y The various blast-machines at present in use consist of a cylinder` in which a piston is worked. To cause these apparatuses to work properly it is necessary for the bore of the cylinder to be exact, which requires a long and difficult operation, and is almost impossible when the cylinders are of large diameter.. The adherence of the piston to the sides of the cylinder has also to be insured by employing grease and arranging the piston so as to cause considerable friction. Notwithstanding these precautions, the loss of air may be estimated at at least twenty or twentyfive per cent., and when the apparatus has been worked for a moderate period the cylinder is found to be increased and the piston diminished in diameter on account of the friction.

l In the present system the machine is of simple construction, requiring no great exactness, an economy in the motive power is obtained, and as there is no friction of the cylinders no repairs are required.

This machine is constructed as follows: The outer receptacle A' is widened at its upper part F' in order to contain the water or mercury displaced in the working, and is fixed at its base P by a cast-iron stand O'. An inner receptacle C' of cylindrical form is xed at its base to the cast-iron stand, and is closed at the tcp except at the orifice of the pipe D'. A compressing-cylinder B is placed between the outer receptacle and the inner cylinder. It is closed at its upper port and is furnished with two valves lined with leather, which open inwardly to give aLlmittance to the air.

To set the machine in operation, the receptacle A is filled with water or mercury up to the line l. On raising the cylinder B by means of the axle N', which bears the eccentric K', and communicates an ascending movement to the cylinder by the connectingrod M', the space 3, between the tops of the cylinders B C', becomes filled with air by means of valves. On lowering the cylinder the air contained is forced through the tube D into a reservoir T', from whence-it is conveyed by the pipes X' Y' into the furnace. To prevent loss of time or an interruption of the supply, two groups of cylinders are employed which feed the reservoir simultaneously, the latter being constructed on the same principles as the machine itself. An outer receptacle S of oval form is xed at its base to a cast-iron stand and is widened at its upper part B", and an inner receptacle U' of similar form, fixed at its base to the stand and closed at its upper part B", with the exception of the orifice of the pipes V', communicates with the tubes of the cylinder X', leading to the furnace. A regulating-receptacle T', also of oval form, is situated between the receptacles S and U'. The top is closed, and furnishedy with a safety-valve opening when the pressure becomes too great. It also bears a plate I which is weighted according to the tension desired to be obtained. The pipes V are closed by the valves Z, which open outwardly when the cylinders are lowered and shut when they are raised. The machine being set in operation and the regulating apparatus filled with water or mercury up to the line 2, the air forcedby the compressingcylinders enters the reservoir by the tubes D' and V', and the receptacle T then rises under the pressure of the compressed air in a degree according to the extent of the pressure. It will be thus seen that the supply and the pressure are equal, it being impossible for the air to escape, as the column of water or mercury which intercepts its communication with the atmosphere is at least equal to the internal pressure. No friction takes place as the working is effected in water or mercury, and the expenditure of force is exactly what is necessary. The necessity for precise accuracy in the construction is also done away with, the cylinders being placed at some distance from each other.

In the drawings, Figure 1 is a vertical section ervoir constructed (as are thc whole of the above pieces) of cast-iron or sheet-iron; G', iron guides conducting the cylinders in their working; H',bearings of the guides; I',Valves for the introduction of the air; K', eccentric raising or lowering the cylinders; L', slideblocks rolling on the eccentric; M', connecting-rod communicating movement to the cylinders; N', axle on Which the eccentrics are fixed; O', cast-iron stand; P', cast-iron foundation; Q', junction of the pipes; R', wooden frame-Work on Which the. apparatus is xed; S', outer receptacle of oval form; T', regulating-reservoir; U', innerreceptacle; V', tubes; X', tube for conveying the air, made of cast or sheet iron, (as are the four last-mentioned parts;) Y', tube conducting the air, when required; Z', inner Valves opening` outwardly;

.A", safety-valve; B", reservoir, of cast-iron;

HENRY THIRION.

lVitncsses:

H. W. SPENCER, L. SELER. 

